<div class="problemindexholder" problemindex="A">
 <div class="ttypography">
  <div class="problem-statement">
   <div class="header">
    <div class="title">
     A. Vladik and Courtesy
    </div>
    <div class="time-limit">
     <div class="property-title">
      time limit per test
     </div>
     2 seconds
    </div>
    <div class="memory-limit">
     <div class="property-title">
      memory limit per test
     </div>
     256 megabytes
    </div>
    <div class="input-file">
     <div class="property-title">
      input
     </div>
     standard input
    </div>
    <div class="output-file">
     <div class="property-title">
      output
     </div>
     standard output
    </div>
   </div>
   <div>
    <p>
     At regular competition Vladik and Valera won
     <span class="tex-span">
      <i>
       a
      </i>
     </span>
     and
     <span class="tex-span">
      <i>
       b
      </i>
     </span>
     candies respectively. Vladik offered
     <span class="tex-span">
      1
     </span>
     his candy to Valera. After that Valera gave Vladik
     <span class="tex-span">
      2
     </span>
     his candies, so that no one thought that he was less generous. Vladik for same reason gave
     <span class="tex-span">
      3
     </span>
     candies to Valera in next turn.
    </p>
    <p>
     More formally, the guys take turns giving each other one candy more than they received in the previous turn.
    </p>
    <p>
     This continued until the moment when one of them couldn’t give the right amount of candy. Candies, which guys got from each other, they
     <span class="tex-font-style-bf">
      don’t consider as their own
     </span>
     . You need to know, who is the first who can’t give the right amount of candy.
    </p>
   </div>
   <div class="input-specification">
    <div class="section-title">
     Input
    </div>
    <p>
     Single line of input data contains two space-separated integers
     <span class="tex-span">
      <i>
       a
      </i>
     </span>
     ,
     <span class="tex-span">
      <i>
       b
      </i>
     </span>
     (
     <span class="tex-span">
      1 ≤
      <i>
       a
      </i>
      ,
      <i>
       b
      </i>
      ≤ 10
      <sup class="upper-index">
       9
      </sup>
     </span>
     ) — number of Vladik and Valera candies respectively.
    </p>
   </div>
   <div class="output-specification">
    <div class="section-title">
     Output
    </div>
    <p>
     Pring a single line "
     <span class="tex-font-style-tt">
      Vladik
     </span>
     ’’ in case, if Vladik first who can’t give right amount of candy, or "
     <span class="tex-font-style-tt">
      Valera
     </span>
     ’’ otherwise.
    </p>
   </div>
   <div class="sample-tests">
    <div class="section-title">
     Examples
    </div>
    <div class="sample-test">
     <div class="input">
      <div class="title">
       Input
      </div>
      <pre>1 1<br/></pre>
     </div>
     <div class="output">
      <div class="title">
       Output
      </div>
      <pre>Valera<br/></pre>
     </div>
     <div class="input">
      <div class="title">
       Input
      </div>
      <pre>7 6<br/></pre>
     </div>
     <div class="output">
      <div class="title">
       Output
      </div>
      <pre>Vladik<br/></pre>
     </div>
    </div>
   </div>
   <div class="note">
    <div class="section-title">
     Note
    </div>
    <p>
     Illustration for first test case:
    </p>
    <p>
     <img class="tex-graphics" src="/predownloaded/cc/76/cc76086f5a60242bb19e5068606374fdbde2d09e.png" style="max-width: 100.0%;max-height: 100.0%;"/>
    </p>
    <p>
     Illustration for second test case:
    </p>
    <p>
     <img class="tex-graphics" src="/predownloaded/9f/0f/9f0fa95537061b3b9fcd7b421f0bc55ee237787d.png" style="max-width: 100.0%;max-height: 100.0%;"/>
    </p>
   </div>
  </div>
  <p>
  </p>
 </div>
</div>
